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Method for manufacturing biogas and organic fertilizer by straw

A technology of organic fertilizer and straw pulverizer, applied in the direction of organic fertilizer, fertilizer made of biological waste, sewage/sludge fertilizer, etc., can solve the problem that biogas residue and biogas slurry are not well utilized, limit the application of biogas engineering and Promotion, secondary pollution resources and other issues, to achieve the effect of facilitating the formation of soil aggregate structure, facilitating the use of anaerobic microorganisms, and increasing the methane content

Inactive Publication Date: 2012-01-18
雷震
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low dry matter content in wet fermentation, the energy used to maintain the temperature of the reaction system is largely occupied by solvent water, especially in the north, more than 30% of the energy is consumed for system insulation, resulting in a large amount of energy. waste, which greatly limits the application and promotion of biogas engineering, and biogas residue and biogas slurry are not well utilized
Some even cause secondary pollution and waste of resources

Method used

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  • Method for manufacturing biogas and organic fertilizer by straw
  • Method for manufacturing biogas and organic fertilizer by straw
  • Method for manufacturing biogas and organic fertilizer by straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Pretreatment of straw:

[0048] ①Straw crushing:

[0049] The straw is pulverized by a straw pulverizer, and the length of the pulverized straw is 20 mm.

[0050] ②Straw wetting:

[0051]Add water at a ratio of 1:1 to wet the crushed straw, and turn the straw while adding water to ensure uniform wetting; after the wetting is completed, place the straw for 24 hours to facilitate the straw to fully absorb water.

[0052] ③ Mixing of raw materials:

[0053] Add the compound bacterial agent and ammonium bicarbonate to the wetted straw while stirring well, and add water at the same time, the amount of water added is twice the weight of the straw, so that the moisture content of the straw is 60%; the amount of the compound bacterial agent added is the crop straw 0.25% of the mass, the addition of ammonium bicarbonate should ensure that the C / N of the fermentation feed liquid is 25:1;

[0054] (2) Stack retting of straw:

[0055] Pile the wet straw with a height of 1m...

Embodiment 2

[0062] (1) Pretreatment of straw:

[0063] ①Straw crushing:

[0064] The straw is pulverized by a straw pulverizer, and the length of the pulverized straw is 20 mm.

[0065] ②Straw wetting:

[0066] Add water at a ratio of 1:1 to wet the crushed straw, and turn the straw while adding water to ensure uniform wetting; after the wetting is completed, place the straw for 24 hours to facilitate the straw to fully absorb water.

[0067] ③ Mixing of raw materials:

[0068] Add the compound bacterial agent and ammonium bicarbonate to the wetted straw while stirring well, and add water at the same time, the amount of water added is twice the weight of the straw, so that the moisture content of the straw is 55%. 0.15% of the mass, the addition of ammonium bicarbonate should ensure that the C / N of the fermentation feed liquid is 25:1.

[0069] (2) Stack retting of straw:

[0070] Pile the wet straw with a height of 1.5m. Drill holes with sharp wooden sticks every 20cm on the top of...

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Abstract

The invention relates to the technical field of renewable energy resources, and especially relates to a method for manufacturing biogas and organic fertilizer by straw. The invention comprises the following steps of: (1) straw pretreatment; (2) straw retting; (3) anaerobic fermentation; (4) utilization of fermentation products. The invention significantly increases the degradation rate and biogas yield of straw, stabilizes the pH value of the fermentation system by combining with the bactericide pretreatment, facilitates the normal proceeding of anaerobic fermentation, and thus increases the methane content in the biogas. The invention greatly saves cost, and has almost no sewage discharge; the utilization rate of renewable energy resources is increased; the biogas produced by crop straw anaerobic fermentation is treated by purification procedures of desulphurization and dehydration, and thus can be used as fuel for resident cooking or for power generation; on the other hand, residues produced by straw anaerobic fermentation are separated into biogas residues and biogas slurry which can be prepared into solid and liquid organic fertilizer, and the organic fertilizer is easy to be absorbed by crops, and can greatly increase the comprehensive utilization rate of straw resources.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a method for producing biogas and organic fertilizer from straw. Background technique [0002] my country is a large agricultural country, with very rich crop straw resources such as wheat straw, rice straw, bean stalk, and corn stalk. It has been fully developed and utilized, and the treatment method in many places is incineration, which not only fills the air with smoke, affects air and land traffic, but also causes serious air pollution, and is also a huge waste of biomass resources. On the other hand, due to the long-term use of chemical fertilizers and pesticides in large quantities in the vast rural areas of our country, the air permeability and porosity of the soil are greatly reduced, the soil agglomeration is serious, and the soil environment for crop growth has been greatly damaged. If chemical fertilizers are used for a long time, it is bound to be serious. Af...

Claims

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Application Information

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IPC IPC(8): C12P5/02C05F5/00C05F7/00
CPCY02E50/343Y02A40/20Y02E50/30Y02P20/133Y02P20/59Y02W30/40
Inventor 雷震张小平田秀财王彬
Owner 雷震
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